But while these technologies hold great promise to help the world's poor, there remain significant barriers to making them available to women.

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So, while stem cells still hold great promise for regenerative medicine, their use as tools for research and drug testing is having more immediate impact.

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Long term, such free trade agreements hold great promise for spurring increased competitiveness, including in sectors like agriculture, now largely zombified by decades of government protection.

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Reverse mortgages, which hold great promise as a way for the frail elderly to pay for long-term care costs while living at home, are failing to do the job.

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The tax credit will be available to the small biotech firms around the country whose research has been judged by our NIH experts to hold great promise to lead to new therapies and medical innovation.

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"Stem-cell research is in a very early state and while it may hold great promise we should not overstate the state of science, or politicise these issues, " he wrote in a recent edition of Nature magazine.

BBC: NEWS | Americas | Q&A: The politics of stem cells